===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/top/top.c,v
retrieving revision 1.101
retrieving revision 1.102
diff -c -r1.101 -r1.102
*** src/usr.bin/top/top.c	2019/10/08 20:51:03	1.101
--- src/usr.bin/top/top.c	2020/01/06 20:05:10	1.102
***************
*** 1,4 ****
! /*	$OpenBSD: top.c,v 1.101 2019/10/08 20:51:03 kn Exp $	*/
  
  /*
   *  Top users/processes display for Unix
--- 1,4 ----
! /*	$OpenBSD: top.c,v 1.102 2020/01/06 20:05:10 zhuk Exp $	*/
  
  /*
   *  Top users/processes display for Unix
***************
*** 68,73 ****
--- 68,74 ----
  int		rundisplay(void);
  
  static int	max_topn;	/* maximum displayable processes */
+ static int	skip;		/* how many processes to skip (scroll) */
  
  extern int ncpu;
  extern int ncpuonline;
***************
*** 126,131 ****
--- 127,136 ----
  #define CMD_add		21
  #define CMD_hl		22
  #define CMD_cpus	23
+ #define CMD_down	24
+ #define CMD_up		25
+ #define CMD_pagedown	26
+ #define CMD_pageup	27
  
  static void
  usage(void)
***************
*** 557,562 ****
--- 562,576 ----
  				active_procs = topn;
  			if (active_procs > max_topn)
  				active_procs = max_topn;
+ 			/* determine how many process to skip, if asked to */
+ 			/*
+ 			 * this number is tweaked by user, but gets shrinked
+ 			 * when number of active processes lowers too much
+ 			 */
+ 			if (skip + active_procs > system_info.p_active)
+ 				skip = system_info.p_active - active_procs;
+ 			for (i = skip; i > 0; i--)
+ 				skip_next_process(processes);
  			/* now show the top "n" processes. */
  			for (i = 0; i < active_procs; i++) {
  				pid_t pid;
***************
*** 618,624 ****
  	char ch, *iptr;
  	int change, i;
  	struct pollfd pfd[1];
! 	static char command_chars[] = "\f qh?en#sdkriIuSopCHg+P1";
  
  	/*
  	 * assume valid command unless told
--- 632,638 ----
  	char ch, *iptr;
  	int change, i;
  	struct pollfd pfd[1];
! 	static char command_chars[] = "\f qh?en#sdkriIuSopCHg+P109)(";
  
  	/*
  	 * assume valid command unless told
***************
*** 966,971 ****
--- 980,1000 ----
  			combine_cpus = !combine_cpus;
  			max_topn = display_resize();
  			reset_display();
+ 			break;
+ 		case CMD_down:
+ 			skip++;
+ 			break;
+ 		case CMD_up:
+ 			if (skip > 0)
+ 				skip--;
+ 			break;
+ 		case CMD_pagedown:
+ 			skip += max_topn / 2;
+ 			break;
+ 		case CMD_pageup:
+ 			skip -= max_topn / 2;
+ 			if (skip < 0)
+ 				skip = 0;
  			break;
  		default:
  			new_message(MT_standout, " BAD CASE IN SWITCH!");